B
PERFORMING OPERATIONS; TRANSPORTING
B
PERFORMING OPERATIONS; TRANSPORTING
B08
CLEANING
B08
CLEANING
B08B
CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
B08B
CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
B08B7/00
Cleaning by methods not provided for in a single other subclass or a single group in this subclass
B08B7/00
Cleaning by methods not provided for in a single other subclass or a single group in this subclass